text: """
  Add token refresh_token_expires
  
  Revision ID: 9bcc39244e82
  Revises: 74bff6a7d9de
  Create Date: 2017-08-02 15:19:39.710878
  """
  
  from __future__ import unicode_literals
  
  import sqlalchemy as sa
  from alembic import op
  
  revision = '9bcc39244e82'
  down_revision = '74bff6a7d9de'
  
  
  def upgrade():
      op.add_column('token', sa.Column('refresh_token_expires', sa.DateTime, nullable=True))
  
  
  def downgrade():
      op.drop_column('token', 'refresh_token_expires')
  